Rust

SSH Tunnel Authenticate with a Password

Demonstrates the Chilkat SshTunnel.AuthenticatePw method, which authenticates the SSH connection with a login name and password. The first argument is the login and the second is the password. Connect first, and call BeginAccepting afterward.

Background: Password authentication is the simplest option, but the password is a secret and should never be a hard-coded literal — obtain it from an interactive prompt, an environment variable, or a secrets vault. Public-key authentication is generally preferred for the unattended, long-running services that tunnels often are.

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Rust


// Demonstrates the SshTunnel.AuthenticatePw method, which authenticates the SSH connection with
// a login name and password.  The 1st argument is the login and the 2nd is the password.

let tunnel = chilkat::SshTunnel::new();

// The tunnel forwards accepted local connections to this destination through the SSH server.
tunnel.set_dest_hostname("db.internal.example.com");
tunnel.set_dest_port(5432);

// Connect to the SSH server.  This performs the TCP/proxy connection and SSH handshake, but
// does not authenticate yet.
let ssh_port = 22;
if tunnel.connect("ssh.example.com", ssh_port).is_err() {
    println!("{}", tunnel.last_error_text());
    return;
}

// Normally you would not hard-code the password in source.  You should instead obtain it
// from an interactive prompt, environment variable, or a secrets vault.
let password = "mySshPassword".to_string();

if tunnel.authenticate_pw("mySshLogin", &password).is_err() {
    println!("{}", tunnel.last_error_text());
    return;
}

println!("Authenticated.");

// After authenticating, call BeginAccepting to start listening for local connections to forward.

let wait_for_thread_exit = true;
if tunnel.close_tunnel(wait_for_thread_exit).is_err() {
    println!("{}", tunnel.last_error_text());
    return;
}